Finding the Fourth Proportional to 80,772.72, 111,414.48 and 52,128.96

Step by Step Solution

1. Step 1: Write the proportion equation
   80,772.72 : 111,414.48 = 52,128.96 : x
2. Step 2: Convert to fraction form
   80,772.72/111,414.48 = 52,128.96/x
3. Step 3: Cross multiply
   80,772.72x = 111,414.48 × 52,128.96
4. Step 4: Simplify right side
   80,772.72x = 5,807,920,971.34
5. Step 5: Solve for x
   x = 5,807,920,971.34/80,772.72
6. Step 6: Final answer
   x = 71,904.49